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A-Mount Teleconverters Guide

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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 04:19
As promised 400mm tests:
100-400 APO @ 400mm vs 200G + APO 2X vs 200G + Tamron SP (Kenko Pro 300) 2X vs Tokina SD 400mm comparison:

Original image:


100% crop wide open center:


100% crop wide open corner:


100% crop stop down center:


100% crop stop down corner:


enjoy,
eccl
 



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Post Options Post Options   Quote ab012 Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 04:31
Originally posted by H_K_F H_K_F wrote:

I had a Minolta 1.4X APO(D) version, there is hardly any optical loss noticeable, excellent TC


Agree! That 1.4x APO (i got the II version) is SHOCKINGLY good! I use it with the STF and 400G and I notice hardly any degradation.

The foto tests show why - optically 10/10 for the minolta 1.4x (unmatched by any other TC tested for all brands in their tests)



Bernard

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Post Options Post Options   Quote ab012 Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 04:46
very well done once again ECCL! thanks!

that 100-400 looks better and better!

ps - can you double check the Tokina results? the center crops seem to indicate that the f5.6 crop seems much better then the f11 crop... my experience with this lens is the opposite;)
Bernard

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Post Options Post Options   Quote brettania Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 11:28
Thanks again Ed. To me the contrast of the 100-400 and its centre sharpness is interesting but the 200 prime (without or with the "best" converters) is the clear overall winner.
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Post Options Post Options   Quote apchoo Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 11:43
Originally posted by eccl eccl wrote:

I have both the Tamron SP 1.4X (white) and SP 2X (white)and only the 2X reports the correct F stop. 1.4X doesn't.

Can you check with your friend to confirm his Tamron 1.4X SP TC (white) reports the correct aperture.

Thanks,
eccl


I was mistaken ... my friend only has the Tamron SP 2X and it does report the correct f/stop for him. So it looks like the Tamron SP/Kenko Pro 300 1.4X does not report the correct f/stop.
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Post Options Post Options   Quote X-R-M Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 14:04
ECCL, thank you for great comparison.
I am going to take closer look when I get back from work.
Cheers
Jerry
 



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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 16:10
Originally posted by ab012 ab012 wrote:

very well done once again ECCL! thanks!

that 100-400 looks better and better!

ps - can you double check the Tokina results? the center crops seem to indicate that the f5.6 crop seems much better then the f11 crop... my experience with this lens is the opposite;)


Yes, I'm keeping the 100-400 although I already have 100-300 and 200G. Sometime it is handy to have the range available especially when you do not have time to change/add a teleconverter.

I believe the images are correct but the Tokina is the only one that has unexpected results. It could be the lens or other factor. I'm planning to retest the Tokina 400mm together with 1.4X and 2X TC to confirm.

eccl
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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 16:26
Originally posted by brettania brettania wrote:

Thanks again Ed. To me the contrast of the 100-400 and its centre sharpness is interesting but the 200 prime (without or with the "best" converters) is the clear overall winner.


Totally agreed. 200G is the best lens in the 200mm focal length for Minolta and I intend to keep on using it.

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Post Options Post Options   Quote H_K_F Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 17:15
Excellent comparision! Many thanks!!

Edited by H_K_F - 09 February 2006 at 17:17
Dynax 7,9,A2,5D
Sony A700,A900,A99
17-35G, 24-70Z, 28-70G, 70-200G, 35G, 50D, 85G, 100D, 300/2.8G, 600G
NEX5,5R,A7Rii
10-18, 16, 18-200, 24-70Z, 35/2.8Z, 55/1.8Z, 85/1.8Z, 70-200/4
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Post Options Post Options   Quote X-R-M Quote  Post ReplyReply Direct Link To This Post Posted: 11 February 2006 at 00:31
   I wonder if anybody has experience with Kenko/Tamron 1.4x teleconverter on Minolta 70-210/4.0.
   I am tempted to get that TC to use on 70-210/4, to get
100-300/5.6, and also use that TC with 200/2.8.
   I wonder how 70-210/4 with 1.4x would hold against
100-300/4.6-5.6?
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Post Options Post Options   Quote H_K_F Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2006 at 16:58
After reading the post, I rushed off to get a 2X APO II, and lucky I got the last one in stock.

The saleperson still honored the "bundle price" with the 300mm f2.8 even after a month. I paid HK$2200 (~US$280) instead of the ori. price of HK$2780 (~US$360). (D) version would cost HK$3480 (~US$450) if available now. I paid a total of HK$19000 (~US$2440) for a 300mm f2.8 and a 2X APO II.

With anticipated slight loss of quality, I'm quite pleased with the result. I had post some image in the Off Contest section.
Dynax 7,9,A2,5D
Sony A700,A900,A99
17-35G, 24-70Z, 28-70G, 70-200G, 35G, 50D, 85G, 100D, 300/2.8G, 600G
NEX5,5R,A7Rii
10-18, 16, 18-200, 24-70Z, 35/2.8Z, 55/1.8Z, 85/1.8Z, 70-200/4
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Post Options Post Options   Quote Sanjuro Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2006 at 08:32
eccl, wonderful stuff, I had so many questions about this and thanks to you they got answered.

Thanks a lot for sharing and the effort of doing this!

Edited by Sanjuro - 13 February 2006 at 08:32
Rgds
Sanjuro

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Post Options Post Options   Quote X-R-M Quote  Post ReplyReply Direct Link To This Post Posted: 14 February 2006 at 05:14
Couldn't resist.After reading ECCL's great compendium and seeing all those sample images ordered and received Minolta TC APO II for 200/2.8 G.
Too bad we had terrible weather over the weekend - I got to deal with 20" of snow. Hopefully next weekend will let me try that combo.
I am still thinking of 1.4 Kenko.
Has anybody experience of using it on 70-210/4.0?
Could 70-210/4.0 with 1.4 TC be better in sharpness than Minolta 100-300 APO lens?

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Post Options Post Options   Quote damian.bradley Quote  Post ReplyReply Direct Link To This Post Posted: 19 February 2006 at 01:31
Is there any way to differentiate between 4 and 7 element generic converters? Some (like vivitar) I don't think are labelled, while others have MC4 or MC7 on the side.

Thanks, and again great work.
Thou shalt not covet thy neighbour's lens // Portfolio
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